Abstract:A space-time double iterative Sequential Monte Carlo (SMC) sampling-based detection algorithm is proposed for flat fading MIMO channel,based on traditional algorithms which only focus on time sampling or space sampling. A space-time multidimensional integral is established to compute the signal’s probability. SMC samples are drawn from both space and time dimensions, and the integral numerical value is approximated by weighted samples. The time samples are also utilized to complete joint channel estimation. The simulation result indicates that the proposed algorithm can obtain the suboptimal performance by low computational complexity.